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crackgmat007
- Legendary Member
- Posts: 882
- Joined: Fri Feb 20, 2009 2:57 pm•Followed by: 1 member
- Thanked: 15 times
- GMAT Score:690
IMO E
I was wrong..i guess its C
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Source: Beat The GMAT — Data Sufficiency |
Last edited by tohellandback on Tue Jul 21, 2009 9:39 pm, edited 1 time in total.
The powers of two are bloody impolite!!
try to plugin values according to the given options ..if you are getting variable options a/ b is wrong but c is right
try to plugin values according to the given options ..if you are getting variable options a/ b is wrong but c is right
can someone post the explanation here..
pluggin in numbers is fine but can someone post the algebraic explanation
pluggin in numbers is fine but can someone post the algebraic explanation
The powers of two are bloody impolite!!
x/x-y = y-x/2(1+y)
from one :-
x>0>y
from 1 we can conclude that x is positive and y is negative
so we have the orginal equation in the form:-
X(+ ve)
--------------------------------
X(+ve) + Y(as Y negative)
<
-Y -X
---------------------------
2(1 -y)
so y-x
---------
2(1+y)
will result in a positive fraction only when y <-1 hence ..otherwise it wil
result in a negative value hence less than L.H.S
Hence NOT SUFFICIENT
from 2.
y<-1
if X is negative we get X/x-y greater and if xis positive we get y-x/2(1+y)
NOT sufficient
combine both noe u know X is possitive and Y <-1
so RHS will be greater
Hope I make sense
-------
from one :-
x>0>y
from 1 we can conclude that x is positive and y is negative
so we have the orginal equation in the form:-
X(+ ve)
--------------------------------
X(+ve) + Y(as Y negative)
<
-Y -X
---------------------------
2(1 -y)
so y-x
---------
2(1+y)
will result in a positive fraction only when y <-1 hence ..otherwise it wil
result in a negative value hence less than L.H.S
Hence NOT SUFFICIENT
from 2.
y<-1
if X is negative we get X/x-y greater and if xis positive we get y-x/2(1+y)
NOT sufficient
combine both noe u know X is possitive and Y <-1
so RHS will be greater
Hope I make sense
-------
